Looseness-proof fastening structure of counterweight bolts of large excavator and fastening method thereof

Abstract

The invention discloses a looseness-proof fastening structure of counterweight bolts of a large excavator, comprising counterweight bolts. The structure is characterized in that gaskets are arranged between the counterweight bolts and an excavator platform assembly, and the gasket consists of an annular body, flanks at least arranged at the two sides of the annular body, and an extending piece arranged at the other side relative to the flanks. The method comprises the following steps: (1) the counterweight bolts pass through the annular body on the gasket to realize that the extending piece on one side of the annular body is parallel to the excavator platform assembly, and the outer border of the excavator platform assembly is packed by the turnup at the end of the extending piece; (2) the counterweight bolts are screwed tightly with a given torque; (3) the flanks at least arranged at the two sides of the annular body are bent through a chisel, and then the corresponding hexagonal ridge surfaces of the counterweight bolt are respectively packed by the flanks. In the looseness-proof fastening structure of the counterweight bolts of the invention, by the arrangement of the gaskets and the cooperation of the extending piece and the flanks, the counterweight bolts are ensured to be difficult to loose, thereby meeting the requirements of the working conditions of the excavator.

Description

technical field [0001] The invention relates to a bolt anti-loosening fastening device and a fastening method thereof, in particular to a large excavator counterweight bolt anti-loosening fastening structure and a fastening method thereof. Background technique [0002] Excavator is a kind of widely used earth-rock construction machinery, which usually works under high-load conditions, which puts forward high requirements for the effective and tight connection between various parts and components. As an important part of the balance excavator, the counterweight is composed of a counterweight shell and a counterweight block. The counterweight block is poured into the welded shell in the form of cement slurry, and is fixed with the excavator platform by the counterweight bolt. Since the counterweight bolts work under shock and vibration conditions, the connection is easy to loosen. In the past, the tightening torque was used to prevent the bolts from loosening. However, under c...

AI Technical Summary

Problems solved by technology

Since the counterweight bolts work under shock and vibration conditions, the connection is easy to loosen. In the past, the tightening torque was used to prevent the bolts from loosening. However, under complex working conditions and long-term operation, it is inevitable that the bolts will Loose, affecting the reliability of the product

[0003] In order to prevent the bolts from loosening, it is usually used in conjunction with anti-loosening bolts or anti-loosening bolts and anti-loosening washers. This type of anti-loosening bolts is realized by setting partial teeth or retreating teeth, that is to say, from changing the bolt teeth The inclination angle of the bolt is used to prevent the bolt from loosening; in addition, by setting the tooth shape on the bottom surface of the bolt end and the gasket together, it cannot be retracted after being snapped in to prevent loosening, but it is relatively difficult to disassemble and maintain

However, the above-mentioned anti-loosening structures all need to change the structure of the bolts, and are only used on ordinary equipment or devices. They are not used on excavators with harsh and changeable working conditions. Therefore, it is necessary to develop an anti-loosening structure suitable for excavators. loose fastening structure

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